Root and Hanna were playing Oregon Trail on an Apple IIe computer. Oregon Trail was developed for the Minnesota Education Computing Consortium (MECC), and used by elementary schools in the early days of home computing to teach school children about the realities of 19th century pioneer life on the Oregon Trail. Later, it was marketed to home users by Broderbund Software, which ceased updating the software when it was absorbed by Scholastic Books. More modern versions of the program eventually returned to the market across multiple platforms when The Learning Company bought Scholastic's software rights.

Although Root's full first name Samantha was never mentioned in the episode, she is listed as "Groves, Samantha" in Hanna's missing persons report.

Bad code, according to Root, is a person who is evil and can not change his or her nature. Finch later uses the term in the episode “Triggerman”.

Relton, MD, the small town where Reese tracked down Root to Weeks' cottage, doesn't exist in real life. On Reese's map it was placed where there's actually a small historical town named St. Mary's City.

Finch left a tap code on Davenport's phone indicating Root's escape route. One might notice that Reese omitted the letter "K" from his deciphering grid. When using tap code, the letters "C" and "K" share the same grid square which allows the alphabet to be represented in a 5×5 grid.